Results 41 to 50 of about 1,782 (181)

Stability and Synchronization of MMC‐HVDC Systems Using SRF and Inertia‐Based PLLs

open access: yesIET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
This study investigates the influence of synchronous reference frame PLL (SRF‐PLL) and the inertia PLL (IPLL) on the stability of grid‐connected modular multilevel converter high voltage direct current (MMC‐HVDC) systems. The findings highlight intrinsic stability limitations of PLL‐based systems, offering insights toward more stable, PLL‐less ...
Shuai Wang, Robin Preece, Mike Barnes
wiley   +1 more source

Performance Analysis of a Single-Diode Photovoltaic Model Based on a Thevenin’s Equivalent Circuit

open access: yesJournal of Engineering and Sustainable Development
This article proposes a linear Thevenin's equivalent circuit for a single-diode model. The Thevenin's equivalent circuit is derived based on the piecewise linearization for the nonlinear characteristic of the diode.
Ammar AL-GIZI   +3 more
doaj   +1 more source

On the application of radio frequency voltages to ion traps via helical resonators

open access: yes, 2011
Ions confined using a Paul trap require a stable, high voltage and low noise radio frequency (RF) potential. We present a guide for the design and construction of a helical coil resonator for a desired frequency that maximises the quality factor for a ...
A.I. Zverev   +23 more
core   +1 more source

Vanadium redox flow batteries: Potentials and challenges of an emerging storage technology [PDF]

open access: yes, 2016
open4noIn this paper an overview of Vanadium Redox Flow Battery technologies, architectures, applications and power electronic interfaces is given.
Guarnieri, Massimo   +3 more
core   +1 more source

Total Distortion—A New Power Quality Index on Current Harmonic Evaluation for Users With Internal Loads and DERs

open access: yesIET Generation, Transmission &Distribution, Volume 20, Issue 1, January/December 2026.
ABSTRACT The IEEE Std 519–2022 IEEE Standard for harmonic control in electric power systems is widely used for controlling the harmonics in the electric power system. It uses the total demand distortion (TDD) for current harmonic evaluation at the point of common coupling (PCC).
Sivaraman P   +3 more
wiley   +1 more source

Generation Algorithms for Thévenin and Norton Equivalent Circuits

open access: yesEnergies
The growing complexity of electrical systems requires advanced analysis tools to optimize the design time and resources. While many circuit simulators exist, they often lack the flexibility needed for real-world applications.
Mihaela Grib   +6 more
doaj   +1 more source

Evaluation of Lithium-Ion Battery Equivalent Circuit Models for State of Charge Estimation by an Experimental Approach

open access: yesEnergies, 2011
To improve the use of lithium-ion batteries in electric vehicle (EV) applications, evaluations and comparisons of different equivalent circuit models are presented in this paper.
Jinxin Fan, Hongwen He, Rui Xiong
doaj   +1 more source

A Novel Bi-LSTM-Based Method for Thevenin Equivalent Parameter Identification

open access: yesFrontiers in Energy Research, 2022
Insufficient power system operation data sets hinder the extensive application of various artificial intelligence algorithms. The solution of the Thevenin equivalent parameters especially depends on the power flow data of the grid.
Chengyu Li, Jilai Yu, Jiaxin Lv
doaj   +1 more source

An electronics Threshold-Concept Inventory: Assessment in the face of the dependency of concepts [PDF]

open access: yes, 2012
The Theory of Threshold Concepts (TCs), first articulated by Land and Meyer in 2003, provides educators in many disciplines with a tool to identify those special ideas that both define the characteristic ways of thinking of expert practitioners, and ...
Harlow, Ann   +2 more
core   +1 more source

PWM Harmonic Signature Based Islanding Detection for a Single-Phase Inverter with PWM Frequency Hopping [PDF]

open access: yes, 2017
Distributed generation (DG) has gained popularity in recent years due to the increasing requirement for renewable power sources. A problem that exists with DG systems is the islanding of DG units that creates safety issues for personnel as well as the ...
Colombage, K.   +3 more
core   +1 more source

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